apply (), applymap difference (), map () python inside apply, applymap and map of

Pandas difference in the map, applymap and apply the

  https://blog.csdn.net/u010814042/article/details/76401133/

map (Pandas in), apply () and applymap () applications

  https://blog.csdn.net/maymay_/article/details/80229053

The difference in the python apply, applymap and map of

https://www.cnblogs.com/cymwill/p/7577369.html